TESTING ENGINES FOR THE UNEXPECTED BEGINS BY TESTING IN UNEXPECTED PLACES. A car is only as good as its engine. Which is why, at GM, we challenge engines in ways normal driving can't. In fact, some of our most demanding tests of engine durability happen at a place where you can't drive a car at all. They happen at sea, where nearly all of the gasoline stern drive and inboard boats in the United States feature a GM-powered marine engine under the hatch. Marine engines are built starting from some of the very same base engines found in our cars and trucks. On the water, where there are no towing services or mechanics, durability is critical. Cutting through pounding waves alone requires up to fifteen times the horsepower needed to power an automobile at the same speed on a level road. It's the equivalent of driving a truck with a 15,OOO-pound trailer up a steep 10% grade. It's a harsh environment for any engine, which is exactly why we do it. There's also the GM dock test, where we run an engine full-throttle for 275 hours. Thanks to the variety of durability testing we do, we're able to design a host of engines that require minimal maintenance - only fluids and filters for the first 100,000 miles. An example of engineering efficiency that leads to long-term durability_ And on land, our engines pass the test in situations where reliability is often a matter of life or death. GM engines in industrial applications run emergency generators and backup systems for FAA air traffic control, critical care nursing facilities and wireless telecommunications towers When the power goes out, we stay on. We're building engines people count on. In cars. In trucks. And in vehicles where miles per hour are measured in knots and the traffic sig.nals flash from lighthouses. M CHEVROLET PONTIAC BUICK CADILLAC gm.com GMC OLDSMOBILE SATURN HUMMER SAAB @2004 GM Corp. All rights reserved. The marks of General Motors and its divisions are registered trademarks of General Motors Corporation